Subversion-Projekte lars-tiefland.ci

 /*!
 * Thumbnail helper for fancyBox
 * version: 1.0.7 (Mon, 01 Oct 2012)
 * @requires fancyBox v2.0 or later
 *
 * Usage:
 *     $(".fancybox").fancybox({
 *         helpers : {
 *             thumbs: {
 *                 width  : 50,
 *                 height : 50
 *             }
 *         }
 *     });
 *
 */
(function ($) {
        //Shortcut for fancyBox object
        var F = $.fancybox;

        //Add helper object
        F.helpers.thumbs = {
                defaults : {
                        width    : 50,       // thumbnail width
                        height   : 50,       // thumbnail height
                        position : 'bottom', // 'top' or 'bottom'
                        source   : function ( item ) {  // function to obtain the URL of the thumbnail image
                                var href;

                                if (item.element) {
                                        href = $(item.element).find('img').attr('src');
                                }

                                if (!href && item.type === 'image' && item.href) {
                                        href = item.href;
                                }

                                return href;
                        }
                },

                wrap  : null,
                list  : null,
                width : 0,

                init: function (opts, obj) {
                        var that = this,
                                list,
                                thumbWidth  = opts.width,
                                thumbHeight = opts.height,
                                thumbSource = opts.source;

                        //Build list structure
                        list = '';

                        for (var n = 0; n < obj.group.length; n++) {
                                list += '<li><a style="width:' + thumbWidth + 'px;height:' + thumbHeight + 'px;" href="javascript:jQuery.fancybox.jumpto(' + n + ');"></a></li>';
                        }

                        this.wrap = $('<div id="fancybox-thumbs"></div>').addClass(opts.position).appendTo('body');
                        this.list = $('<ul>' + list + '</ul>').appendTo(this.wrap);

                        //Load each thumbnail
                        $.each(obj.group, function (i) {
                                var href = thumbSource( obj.group[ i ] );

                                if (!href) {
                                        return;
                                }

                                $("<img />").load(function () {
                                        var width  = this.width,
                                                height = this.height,
                                                widthRatio, heightRatio, parent;

                                        if (!that.list || !width || !height) {
                                                return;
                                        }

                                        //Calculate thumbnail width/height and center it
                                        widthRatio  = width / thumbWidth;
                                        heightRatio = height / thumbHeight;

                                        parent = that.list.children().eq(i).find('a');

                                        if (widthRatio >= 1 && heightRatio >= 1) {
                                                if (widthRatio > heightRatio) {
                                                        width  = Math.floor(width / heightRatio);
                                                        height = thumbHeight;

                                                } else {
                                                        width  = thumbWidth;
                                                        height = Math.floor(height / widthRatio);
                                                }
                                        }

                                        $(this).css({
                                                width  : width,
                                                height : height,
                                                top    : Math.floor(thumbHeight / 2 - height / 2),
                                                left   : Math.floor(thumbWidth / 2 - width / 2)
                                        });

                                        parent.width(thumbWidth).height(thumbHeight);

                                        $(this).hide().appendTo(parent).fadeIn(300);

                                }).attr('src', href);
                        });

                        //Set initial width
                        this.width = this.list.children().eq(0).outerWidth(true);

                        this.list.width(this.width * (obj.group.length + 1)).css('left', Math.floor($(window).width() * 0.5 - (obj.index * this.width + this.width * 0.5)));
                },

                beforeLoad: function (opts, obj) {
                        //Remove self if gallery do not have at least two items
                        if (obj.group.length < 2) {
                                obj.helpers.thumbs = false;

                                return;
                        }

                        //Increase bottom margin to give space for thumbs
                        obj.margin[ opts.position === 'top' ? 0 : 2 ] += ((opts.height) + 15);
                },

                afterShow: function (opts, obj) {
                        //Check if exists and create or update list
                        if (this.list) {
                                this.onUpdate(opts, obj);

                        } else {
                                this.init(opts, obj);
                        }

                        //Set active element
                        this.list.children().removeClass('active').eq(obj.index).addClass('active');
                },

                //Center list
                onUpdate: function (opts, obj) {
                        if (this.list) {
                                this.list.stop(true).animate({
                                        'left': Math.floor($(window).width() * 0.5 - (obj.index * this.width + this.width * 0.5))
                                }, 150);
                        }
                },

                beforeClose: function () {
                        if (this.wrap) {
                                this.wrap.remove();
                        }

                        this.wrap  = null;
                        this.list  = null;
                        this.width = 0;
                }
        }

}(jQuery));